Difference between Give someone a glad hand and Give someone a good hand

give someone a glad hand—(also: glad-hand someone) give a person a cordial handshake or greeting:

• Crude economic reasons do not explain why he should have been given the glad hand.

give someone a good hand—(also: give someone a big hand) give a person a large round of applause:

• The club enjoyed her talk and gave her a good hand at the end.